Spirit level



FIG. 1 is a rear elevational view of a spirit level showing my new design;

FIG. 2 is a bottom plan view;

FIG. 3 is a front elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a right side elevational view; and

FIG. 6 is a left side elevational view thereof. 

The ornamental design for a spirit level, as shown. 